Turnstiles



Aug. 2, 1955 H. B. ODELL 2,714,264

TURNSTILES Filed Feb. 16, 1954 s Sheets-Sheet 1 INVENTOR HRBRT 5. ODELL Aug. 2, 1955 H. B. ODELL 2,714,264

TURNSTILES Filed Feb. 16, 1954 3 Sheets-Sheet 2 41 Xi? i IN EN OR HfRBfRT 5. ODELL 2, 1955 H. B. ODELL 2,714,264-

TURNSTILES Filed Feb. 16, 1954 3 SheetsSheet 3 INVENTOR HH8R7 a 00.511.

mwww United States Patent Y1 TURNSTILES Herbert B. Odell, Toronto, Ontario, Canada Application February 16, 1954, Serial No. 410,623

1 11 Claims. (Cl. 39-3) This invention relates to coin-freed turnstiles used for controlling gateways or passages of various kinds, and particularly to turnstiles of the type employing a threearmed barrier which rotates on an axis inclined at fortyfive degrees to the vertical and in which the arms are arranged at a forty-five degree inclination to said axis, whereby when one arm occupies a horizontal barrier position across the passage, the other arms extend downwardly at the side of the passageway.

In this type of turnstile, the actuating and control mechanism is also arranged at an angle to the vertical corresponding with the inclined axis of rotation of the barrier. Where it is desired to control the operation of this type of turnstile by the insertion of a coin, or similar tender, the coin-control mechanism is most conveniently arranged in a horizontal plane, and the mechanical effort must therefore be transmitted from the inclined plane in which the barrier mechanism operates to the plane in which the coin mechanism moves, and back again to the inclined plane to effect the unlocking of the barrier to allow it to make another operational movement.

Heretofore this transmitted effort has been achieved by an impositive mechanism comprising spring pressure in the nature of a plurality of springs. Springs have been found to be unreliable for transmitting the actuating force in the arrangement referred to and when they fail to function the mechanism is rendered inoperative.

In the periodic use of coin-controlled turnstiles, as at fairs and race tracks where they are in use for only a small portion of any year, the springs often become rusted and break, causing non-functioning of the turnstile. It is therefore highly desirable to employ a positive mechanism.

An important object of the invention is to devise a tnrnstile having more reliable barrier operating and control means in which the use of springs in the control means between the coin mechanism and the barrier is dispensed with except a safety spring which does not normally function in the control of the barrier except to prevent breakage on the very rare occasion when a coin jams.

The barrier of the turnstile moves from one stop position to the next stop position by a fast movement, and another important object of the present invention is to control the relative movement of the coin-controlled mechanism to provide a relatively fast action while the barrier is starting its movement and before the barrier has attained speed, and then to bring about a decrease in the speed of movement of the coin-control mechanism in regard to the barrier movement to almost a dwell, during which dwell the coin drops from its useful position, and then to bring about a return of the coin-control mechanism at a suitable controlled speed.

These and other objects which will hereinafter appear are attained by means of the constructions hereinafter de- 2,714,264 Patented Aug. 2, 1955 scribed and illustrated in the accompanying drawings in which:

Fig. 1 is an end elevation of the turnstile mechanism looking at the coin-control device;

Fig. 2 is a cross section on the line 22 of Fig. 3;

Fig. 3 is a plan view of the turnstile actuating mecha nism looking in a substantially downward angle axially of the barrier hub spindle, as denoted by the arrow A, Fig. 1;

Fig. 4 is a similar view to Fig. 3, but with the turnstile ratchet gear removed and showing the indexing rollers carried thereby;

Fig. 5 is a cross section on the line 5-5 of Fig. 4;

Fig. 6 is a cross section on the line 66 of Fig. 4;

Fig. 7 is a cross section on the line '77 of Fig. 4;

Fig. 8 is an enlarged fragmentary detail in plan of the coin-control mechanism;

Fig. 9 is an enlarged detail in side elevation of the coincontrol mechanism taken along 9-9 of Fig. 11;

Fig. 10 is a view in perspective of the turnstile mechanism and coin-control device, but omitting parts for the sake of clarity;

Fig. 11 is a fragmentary top plan view of the turnstile mechanism showing more clearly the connection with the slide of the coin-control device;

Fig. 12 is a sectioned plan view of the ratchet wheel mechanism and barrier rotor of the turnstile;

13 is a side view of the ratchet wheel and dog for precluding retrograde movement, the dog being shown in disengaged position;

Fig. 14 is a similar View, but showing the dog in engaged position;

Fig. 15 is a perspective view of the safety device for the coin-control device;

Fig. 16 is a perspective view of the coin slide element of the coin-control device; and

Fig. 17 is a plan view of the roller-actuated cam.

In the drawings like numerals of reference indicate corresponding parts in the different figures.

The turnstile about to be described is intended for one-way traffic. 1 indicates a supporting frame for the various parts of the turnstile mechanism, which frame is in turn supported in a suitable standard or casing (not shown).

Provided in this frame is a bearing 2, preferably of roller or other anti-friction type, for the spindle 3 of the rotating barrier. The axis of the spindle lies at approximately 45 to the vertical and carries on its lower end the armed barrier. This barrier is formed with a hub 5 from which extend equi-spaced arms 6, preferably three in number, which arms are arranged at approximately an angle of 45 to the axis of the spindle 3. As a result of this arrangement, the arms are successively caused to extend in a horizontal plane across the passage when in barrier position, and to extend downwardly at the side of the passage when out of barrier position.

On the upper end of the spindle 3 and rotatable therewith as by a key connection is a ratchet gear 4, and on the under face of this ratchet gear are mounted three rollers 7, one corresponding to each arm 6 of the rotatable barrier. Said rollers are radially located and equidistantly spaced about the axis 3.

The barrier is, of course, rotated manually or otherwise by a person gaining entrance by way of the passage controlled by the turnstile. In admitting people successively the barrier is rotated with an intermittent or step by step motion in which the barrier always stops with one arm extending across the controlled passage. This manner of operation is well-known in the art and does not need to be dealt with at greater length, but obviously in the use of a coin-controlled device, it is required that a coin of the proper denomination be deposited before a person may -be admitted. The instant invention is concerned with an improved coin-controlled mechanism.

The rollers 7 form part of the mechanism for yieldably constraining one of-the arms 6 in the horizontal barrier position. Means to this end is well-known in the art, however the structure herein disclosed presents a highly eflicient agency for this purpose. It comprises a detent lever 8 pivoted intermediate it's ends on the upper face of the frame 1. The pivot 9 is located closer to one end of the lever to provide along arm and a short arm. The short arm has pivotally secured thereto, as at 10', one end of a guide rod 10, the other end of which projects through a hole in a bracket 11 Secured to said frame 1. On this guide rod 10 between its pivot and the bracket 11 is shouldered a coil spring 13. The spring 13 is normally under compression and it presses the detent lever 8 against two of the three rollers 7, the pivot 9 being located beyond and below these contacted rollers. Contact is made with the long arm only of the lever, as best seen in Fig. 4.

According to this arrangement, when arm 6 is turned from horizontal barrier position the rollers move in the direction indicated by the arrow in Fig. 4, and the roller which is adjacent to the pivot 9 acts to force the lever outwardly until it swings past a dead centre position whereupon thespring '13 presses on this roller to complete the 120 movement of the barrier. Since this roller travels away from pivot 9 the purchase of the lever is lessened gradually until a central position is again assumed by the barrier, which is a desirable condition of 5 the operation.

Pivoted intermediate its ends on the pivot 32 on the upper side of the frame 1 is a check lever 14, one end of which is pivotally connected to the rod 15 of a plunger operating in a fluid check cylinder 16 supported by said frame 1. The other end of this check lever 14 is forked and thus provides the divergent arms 14, 14". The inner edge faces of these arms of the fork form a cam surface 17 with which the rollers 7 of the barrier engage, the forked lever 14 (which is in turn controlled by the plunger) thus serving as a brake or fluid check to control the speed of movement of the barrier.

The operation of this portion of the apparatus is as follows. As the barrier is rotated by a passer, the long end of the detent lever 8 is first swung outwardly by the adjacent roller 7 'on the barrier, as said roller travels through a partial orbit, putting the spring 13 under considerable compression. As the roller follows its orbit, the long end of the lever becomes free to swing inwardly under the pressure of the spring 13 and exerts a pressure on the barrier to cause it to rapidly complete its movement, which movement, however, is controlled and cushioned by the engagement of the roller 7 with the cam surface 17 of the brake or check lever '14, the movement of the brake lever is retarded by the plunger in the cylinder 16 to bring about a smooth checking action.

movement is to employ a dog or pawl. Such a reverse 'lock is shown in the drawings and this has been found to be very satisfactory, although it is realised that modificatio-n in this regard might be made without departing from the invention. prises a horizontally extending detent bar 70 pivoted at its forward end as at 71 on the frame 1 and restingon the teeth of. the ratchet wheel 4. Pivoted at 72 on the distal' rear end is adog 73 constrained to a limited rocking movement and provided with a forwardly directed tooth The barrier'position is best 1' A suitable mode of preventing retrograde As shown, the reverse lock com- 4 '74 engageable with the teeth of the ratchet wheel. The tooth allows the ratchet wheel to advance, but any tendency to turn backwardly causes the tooth to drop into the nearest interdental space, thus blocking the reverse movement. See Figs. 13 and 14 in particular.

In the upper face of the ratchet wheel 4 are formed three peripheral rabbets 18 providing abrupt radial shoulders 19, and engageable with these shoulders to prevent forward rotation of the ratchet wheel 4 is a pawl 20 pivoted at 20' on a post 12 extending upwardly from the frame 1, said pawl 20 having a latching tooth 21 on its under side adapted to drop into the peripheral ra'bbets 18 and to engage successively the shoulders 19 as the ratchet wheel rotates.

The shoulders 19 are preferably formed of hardened steel inserts which fit into the recesses formed by the rabbets 18 in the ratch wheel,-the purpose being, of course, to reduce wear or damage under rough usage as well as to permit the substitution of fresh inserts whenever necessary without having to supply a completely new ratchet wheel.

The pawl 20 will have sufficient weight to always tend to drop into the rabbets as the ratchet wheel is rotated.

The lifting of the pawl to release the ratchet wheel and to allow the barrier to be rotated another step is effected by means of the coin-control mechanism about to be described.

It will be understood that the reverse lock prevents retrograde movement of the barrier, and that the pawl locks the barrier with one of the arms thereof in barrier posit-ion, whereby a deposit of a coin in the coin-control mechanism is required in order to release the barrier for admitting a person through the controlled passageway. The coin-control mechanism operates to impart a releasing movement to said pawl as will be dealt with later. it might be here mentioned, however, that it is essential to the operation of the coin-control mechanism that a small amount of angular play on the part of the ratchet wheel be allowed with respect to the reverse lock and the locking pawl. Hhis will be explained more fully later on.

The coin mechanism proper is of ordinary construction and no claim is made to it, per se. The coin mechanism is comprised of a support 28 extending upwardly at one end of the frame 1 and provided at its upper end with a drop slot for a coin 54 (Figs. 3, 4, 8, 9 and 11). Extending horizontally of the support 25 below the said drop slot is a horizontal guideway in which a coin slide 31 is movable. This coin slide is provided with a chamfered portion Stlleading to the lateral thrust face 50, which guides the coin into unlocking position in which it is seated against the end of the ledging member 51 as indicated in Fig. 9. The member 51 is held fast by an adjustable finger plate 52 or other means so that the coin slot may be set for coins of different values.

For'example, the coin control device may be adjusted for using a 25 cent coin, or a cent coin.

(Io-operating with the member 51 to hold the coin in unlocking position is a blocking element in the form of a movable arm 53, hereinafter more specifically referred to, and forming a part of the barrier release means. Arm 53 extends transversely of the coinslide 31 and projects through a slot 27 the support 28 and an aligned slot in the coin slide 31.

The slide 31 is normally disposed in its outer position, shown in Fig. 9, and the arm 53, which is movable lengthwise of slots 27 and 55, is normally disposed at the inner ends of said slots and held thereat by means yet to be dealt with. The distance between the inner face 53' of the terminus of the arm 53 and the thrust face 54? is just in excess of the diameter of the proper coin so that the coin is freely admitted therebetween in order thatit may ledge on the inner end 51' of the 'ledging member 51. If a 'coin of small size is inserted in the coin 'slot 27, it will drop between the end 51' or the member 51 and the movable arm 53 and into the reject receiver 49, which is open to the outside so the coin may be recovered.

If the coin 54 is a proper one, it will be held between the inner end 51 of the member 51 and the contact face 53' of the movable arm 53 for further action when the coin slide is moved horizontally, which causes the coin to travel with the coin guide 31 and move the arm 53. The coin finally drops into the chute 48 leading to the coin receptacle (not shown) and the release of the coin is brought about by a release agency hereinafter described.

As set out in the preamble of the specification, the coin slide 31 moves in a horizontal direction, and the barrier and the mechanism operated thereby are arranged at an angle of approximately 45 to the vertical. An important feature of the invention is to devise means for imparting the horizontal movement to the coin slide from the inclined arrangement of the barrier, and also to provide means actuated by the horizontal movement of the coin slide to release the barrier to enable it to complete another step in its intermittent rotary movement, and also to regulate the speed of movement of the coin slide to cause it to quickly release the barrier and then to slow down to a dwell while the coin drops from its working position.

The actuating means by which the horizontal movement of the coin slide is utilized to release the barrier comprises a mechanism by which the pawl 20 is lifted clear of engagement with the ratchet wheel 4.

The actual lifting of the pawl 20 to release the ratchet wheel and allow the barrier to rotate is effected by a lifter arm 22 secured to a post 23 rotatable in bearings 43, 44 supported by the frame 1. The free end of the arm 22 travels between a cam surface 24 on the under side of the pawl 20 and a guide surface 25 mounted on the post 12. The free end of the arm 22 is preferably provided with an antifriction roller 22'.

The transverse blocking arm 53 is secured on the upper end of post 23, and since the cam face 24 slopes downwardly in front of the roller tip of arm 22 the weight of pawl 20 tends to hold the arm 53 in a normal inner position abutting the inner end of slot 27 and may be assisted by a spring 30.

The spring 30 is of the coil type and is fastened at an end to the frame 1 as by an element 30', best shown in Fig. 10. Pawl 20 rests in locking engagement with the ratchet while the arm 53 is in its normal inner position, see Figs. 3, 4, 10, 11 and 12. It should be borne in mind that the latching tooth 21 of the pawl has a predetermined amount of play in the recesses 18 of the ratchet wheel and therefore when a proper coin is inserted in the slot 45 and comes to rest on the ledge 51 the barrier is used to bring about an unlocking action, and in this action the coin is pushed by the slide 31 and the coin in turn pushes the arm 53 and moves the lifting arm 22 to raise the pawl by means of the cam 24.

The operation of the coin slide 31 is controlled from the barrier by a novel cam mechanism having a desirable smooth and quiet action of a positive character. This mechanism comprises a cam plate 33 disposed over the lever 14 and mounted on a pivot 32 to rock. The cam plate is a lever like member having the pivotal connection 32 at one end and having a slot 34 in the other end. A ball end of a lever arm 35 is engaged in slot 34 and the lever 35 extends radially from a shaft 36 journalled in a bracket 37 secured to frame 1. Cam plate 33 is recessed laterally to provide a cam surface which is acted on by the rollers 7. The cam surface includes the sections 33*, 33' and 33". Fig. 4 shows the normal position of the rollers relative to the cam plate. When the arm 6 in barrier position is initially advanced on deposit of a coin the roller 7 at the section 33 of the cam surface throws the cam 33 upwardly with a quick positive action. This is followed by a dwell as this roller rides along the section 33", and then the section 33' effects the return of the cam 33. The shaft 36 has mounted on its other end lever means, hereinafter described in detail, to which is connected one end of a link 38, the other end of which is connected to a post 39 extending from the side of the coin slide 31. This lever means is a safety device which is operative to preclude damage to the coin mechanism in the event that a coin or the like should jam.

The safety lever means just referred to comprises a bellcrank lever 40 made fast on the shaft 36 and a second lever 41 rotatable on the shaft 36 immediately adjacent to lever 40, best seen in Fig. 15.

Lever 40 has its arm 40* extending alongside of a corresponding arm 41 of lever 41 and with its free end disposed laterally to reside in front of said arm 41 said free end being supplied with a screw 42 in adjustable contact with arm 41 so that reverse movement of lever 40 is positively imparted to lever 41 to retract the slide 31 after a forward operational movement.

The companion arm 40 of lever 40 is spaced from a bent arm 41 of lever 41 and connected thereto by an interposed helical spring 46 encircling a guide pin 47 and tensioned in compressive stress. Pin 47 has a head end pivoted to the arm 41". The other end extends loosely through a hole in the arm 40 This safety spring 46 will have suflicient strength to resist relative approaching movement of said levers 40 and 41 under normal operating conditions of the turnstile, but will allow said levers to move relative to one another under emergency conditions as indicated in broken lines, Fig. 15, such as might be caused by the jamming of an improper coin or slug in the coin mechanism. This safety lever means is therefore operative to preclude damage to the coin-control in such an instance. The arrangement may be modified, or on the other hand it could be omitted without adversely effecting the operation of the apparatus other than obviating the feature of safety.

It will be seen that the movement of the coin slide 31 with a coin 54 properly positioned will result in the movement of the lifter arm and cause the lifting of the pawl 20 by the camming action. It will be gathered that unless a coin is placed in the coin slot the pawl cannot be raised by the cam device.

It will be seen that I have devised simple and effective means for effecting the horizontal movement of the coin slide 31 from the cam lever 33, which moves in an inclined plane parallel with the face of the frame 1, which means comprises the shaft 36 rotatable about a horizontal axis, which shaft has the lever arm 35 at one end engaging in the slot 34 in said cam lever, and having at its other end the safety lever means hereinbefore described connected by linkage with the coin slide 31, which lever means comprises the levers 40 and 41 and spring 46.

It will be manifest that I have also devised simple and eifective means for releasing the barrier by the horizontal movement of the coin slide, which, through the medium of a coin, advances the lever arm 53 to cause the simultaneous movement of the lifter arm 22, which by engaging the pawl cam 24, lifts the pawl to disengage it from the shoulder 19 at the end of the rabbet 18 in which the pawl happens to be engaged.

It will be seen that only one spring is employed, the safety spring 46. It will be clearly understood that the purpose of this spring is to provide relief or safety means which Will act to allow the levers 40 and 41 to move to allow their ends 40 and 41 to .move together sufiiciently in case of a coin jamming the apparatus to allow the barrier to complete an operational movement without danger of breakage of any parts of the coin-controlled mechanism.

Now, adverting to the coin release means, it will be evident that when a coin is deposited in the coin slot and pushed forwardly by the slide 3 1 the coin is held from dropping because of the resistance presented by contact with the arm 53. This resistance is due to the force required to raise the pawl 20. The coin release means comprises a radial finger 60 secured on shaft 36 and so disposed that when shaft 36 is forwardly turned by the'cam plate 33 the finger will overtake the arm'53 as the coin is brought into an overhead position with regard to the coin chute 48 and impart to said arm an advancing movement in excess of the rate of travel of the, slide 31 with the consequence that the coin is no longer gripped between the face 53 of the arm and the end 50' of the slide. The coin is thus freed and allowed to drop into said chute. Reverse movement of shaft 36 disengages the finger from the arm 53 ready for recurrent operation. The terminus of finger 60 is supplied With an adjustment screw 61 for abutment with arm 53. The coin release means has a positive action which in volves a structure that has been found to be very satisfactory, but is capable of modification.

As stated in the preamble to this specification, it is an object of the invention to cause the coin slide 31 to move at different relative speeds to that of the barrier as the latter rotates. This variation in the relative speeds is effected by the means of the cam lever .33, the cam surface of which is so shaped that when the barrier is rotated, the cam lever will first apply a rapid action to the parts operating and operated by the coin slide to quickly move the parts to effect the release of the barrier, then allowing the coin slide to slow down to almost a stop while the coin drops into the coin chute, and then accelerates again to permit the pawl to drop and engage in a rabbet in the ratchet wheel to stop the barrier in a locked position with one of the three barrier arms in barrier position for recurrent operation when another coin is deposited.

From the preceding description it will be manifest that I have devised an improved coin-controlled barrier turnstile which is sturdy and reliable in operation, and moreover positive in action. Such changes and variations in the construction may be resorted to as fairly come within the scope of the appended claims.

What I claim is:

1. In a coin-controlled turnstile, a frame, a barrier mounted on said frame with its axis at an angle of 45 to the vertical, a ratchet wheel rotatable with said barrier and having radial shoulders, a dog engaged with said ratchet wheel to preclude retrograde movement thereof, a pawl pivotally supported on said frame and overlying said ratchet wheel, said pawl having a tooth at its distal end engaged with a radial shoulder on said ratchet wheel to normally lock the barrier against operational movement, a lift arm swingably mounted on said frame in a horizontal plane and having a roller-tipped distal end engageable with a cam face on said pawl to lift the pawl out of engagement with the radial shoulder on the ratchet wheel to free the barrier for operational movement, a coin mechanism having a coin slot in which a deposited coin is initially ledged against dropping, a reciprocal slide constituting an element of said coin mechanism, said slide having a thrust face for engaging the coin, a blocking arm united with said lift arm, said blocking arm being yieldably constrained to cause its distal end to bear against the coin, counter to the thrust face of said slide, radial rollers on the ratchet wheel corresponding to the arms of the barrier, a cam plate pivoted on the frame and having a swinging end, said cam plate having a lateral cam surface which is engaged successively by one or more of said rollers to actuate the said swinging end, a shaft journalled in said frame, a lever fixed on said shaft and connected to said cam plate for operation thereby, a lever mounted on said shaft and connected to said slide, and an arm mounted on said shaft and arranged to engage said blocking arm in the final phase of its operation movement to impart to it a coinreleasing movement.

2. In a turnstile comprising an armed rotatable barrier normally locked with limited play with one of its arms in barrier position by means of a coin control mechanism including a slide adapted to advance a deposited coin for operating barrier release means; the improvement including means for advancing said slide, said advancing means comprising a complement of rollers corresponding in number and spacing to the arms of the barrier and supported to move bodily with the barrier about the axis of rotation thereof, a cam plate disposed in a plane radially of said axis of the barrier and pivotally supported at an end to allow the other end to swing, said cam plate being recessed laterally to provide a camming surface engaged with at least one of said rollers so that this roller induces the swinging end of the cam plate to move in one direction when said barrier is turned from one barrier position to the next, and means forming a connection between the swinging end of the cam plate and said slide and utilizing movement of said swinging end in said one direction to advance said slide and reverse movement to retract said slide.

3. In a turnstile comprising an armed rotatable barrier normally locked with limited play with one of its arms in barrier position by means of a coin control mechanism including a slide adapted to advance a deposited coin for operating barrier release means; the improvement including means for advancing said slide, said advancing means comprising a complement of rollers corresponding in number and spacingto the arms of the barrier and supported to move bodily with the barrier about the axis of rotation thereof, a cam plate disposed in a plane radially of said axis of the barrier and pivotally supported at an end to allow the other end to swing, said cam plate being recessed laterally to provide a camming surface engaged with at least one of said rollers so that this roller induces the swinging end of the cam plate to move in one direction when said barrier is turned from one barrier position to the next, a shaft journalled in relatively fixed bearings, a lever arm radially extending from said shaft and connected with the swinging end of said cam plate, and lever means operably connecting said slide to said shaft.

4. A structure as set forth in claim 3, in which the camming surface of the cam plate partly encircles the axis of the barrier and is of a length suflicient to be engaged by two adjacent rollers when an arm of the barrier is in barrier position so as to positively retain the cam plate against movement in either direction until the barrier is advanced from its locked position.

5. A structure as set forth in claim 3, in which the camming surface of the cam plate has its profile varied through its length so that the slide is caused to move at different speeds in an advancing stroke.

6. A structure as set forth in claim 3, in which the camming surface of the cam plate has several sections, one of which induces the cam plate to move in a working stroke and another induces the cam plate to move in a return stroke,

7. A structure as set forth in claim 3, in which the camming surface has three consecutive sections, the first of which causes the cam plate to be moved with a quick throw when traversed by a roller, the second section producing a dwell when traversed by a continued movement of the roller, and the third section serving to effect the return of the cam plate to initial position when traversed by a further movement on the part of the roller.

8. A structure as set forth in claim 3, in which the swinging end of the cam plate is provided with a longitudinal slot, and in which the lever arm operates in a plane transversely of said cam plate and has a ball end engaged in said slot.

9. A structure as set forth in claim 3, in which the lever means includes an interposed resilient device capable of yielding to allow the shaft to turn in the event that the slide is obstructed in an operational movement of the barrier.

10. A structure, as set forth in claim 3, in' which the lever means comprises a bellcrank lever made fast on the shaft, a second lever rotatable on said shaft alongside of said bellcrank lever, the bellcrank lever having a first arm provided with a distal end extending laterally in front of a first arm member of said second lever, the first arm member being linked to the slide, the second lever having a second arm member bent outwardly to extend in a general parallel direction to a second arm of said bellcrank lever, and a compression spring interposed between the second arm member of the second lever and the second arm of the bellcrank.

11. A turnstile mechanism comprising a frame, a rotary barrier having spaced arms and journalled on the frame for unidirectional movement, means for locking said barrier progressively in barrier attitude, said locking means including a pawl engageable with stop shoulders to releasably secure said barrier against advancing from barrier positions, a complement of rollers corresponding in number and spacing to the arms of the barrier and supported to move bodily with the barrier about the latters axis of rotation, a cam plate disposed in a plane radially of said barrier axis and pivotally supported at an end to allow the other end to swing, said cam plate being recessed laterally to provide a camming surface engaged with at least one of said rollers so that this roller induces the swinging end of the cam plate to move in one direction when said barrier is turned from one barrier position to the next, a shaft journalled in said frame, a lever arm extending from said shaft and connected with the swinging end of said cam plate, a coin slide, lever means operably connecting said slide to said shaft, a blocking arm pivoted on said frame and adapted to be advanced by said slide through the medium of an interposed coin, a lift cam device operated by advance movement of said blocking lever to release said pawl, and an arm on said shaft for engaging blocking lever to release the coin.

References Cited in the file of this patent UNITED STATES PATENTS 1,844,784 Nau Feb. 9, 1932 2,144,718 Gersbach Jan. 24, 1939 2,193,962 Gersbach Mar. 19, 1940 2,283,681 Madsen May 19, 1942 2,319,541 Gersbach May 18, 1943 2,564,872 Wingo Aug. 21, 1951 

